The influence of aerobic fitness status on ventilatory efficiency in patients with coronary artery disease
نویسندگان
چکیده
OBJECTIVE To test the hypotheses that 1) coronary artery disease patients with lower aerobic fitness exhibit a lower ventilatory efficiency and 2) coronary artery disease patients with lower initial aerobic fitness exhibit greater improvements in ventilatory efficiency with aerobic exercise training. METHOD A total of 123 patients (61.0±0.7 years) with coronary artery disease were divided according to aerobic fitness status into 3 groups: group 1 (n = 34, peak VO₂<17.5 ml/kg/min), group 2 (n = 67, peak VO₂>17.5 and <24.5 ml/kg/min) and group 3 (n = 22, peak VO₂>24.5 ml/kg/min). All patients performed a cardiorespiratory exercise test on a treadmill. Ventilatory efficiency was determined by the lowest VE/VCO₂ ratio observed. The exercise training program comprised moderate-intensity aerobic exercise performed 3 times per week for 3 months. Clinicaltrials.gov: NCT02106533 RESULTS: Before intervention, group 1 exhibited both lower peak VO2 and lower ventilatory efficiency compared with the other 2 groups (p<0.05). After the exercise training program, group 1 exhibited greater improvements in aerobic fitness and ventilatory efficiency compared with the 2 other groups (group 1: ▵ = -2.5±0.5 units; group 2: ▵ = -0.8±0.3 units; and group 3: ▵ = -1.4±0.6 units, respectively; p<0.05). CONCLUSIONS Coronary artery disease patients with lower aerobic fitness status exhibited lower ventilatory efficiency during a graded exercise test. In addition, after 3 months of aerobic exercise training, only the patients with initially lower levels of aerobic fitness exhibited greater improvements in ventilatory efficiency.
منابع مشابه
Effect of continuous and interval exercise training on the PETCO2 response during a graded exercise test in patients with coronary artery disease
OBJECTIVE The purpose of this study was to evaluate the following: 1) the effects of continuous exercise training and interval exercise training on the end-tidal carbon dioxide pressure (PETCO2) response during a graded exercise test in patients with coronary artery disease; and 2) the effects of exercise training modalities on the association between PETCO2 at the ventilatory anaerobic thresho...
متن کاملThe Effect of Aerobic Interval Training and Massage Therapy on C-Reactive Protein and Cardiorespiratory Fitness in Cardiovascular Patients after Coronary Artery Bypass Graft
The purpose of this study was to investigate the effects of an 8 week period of aerobic interval training and massage therapy on changes in C-reactive protein (CRP) level and cardiorespiratory fitness in cardiovascular patients after coronary artery bypass graft. The study population consisted of patients who had undergone a coronary artery bypass graft and at least one month had passed since t...
متن کاملEffect of one Bout Continuous Versus Intermittent Aerobic Exercise on Plasma Levels of Intercellular Adhesion Molecules 1 and Vascular Cell Adhesion Molecules 1 in Patients with Coronary Heart Disease
Introduction: Adhesion molecules play an important role in the pathogenesis of atherosclerosis and the type of training may affect the response to these indicators. Therefore, the purpose of the present study was to investigate the effect of a continuous versus interval aerobic training session on plasma levels of intercellular adhesion molecules 1 (ICAM-1) and vascular cell adhesion molecules ...
متن کاملEffect of exercise training on ventilatory efficiency in patients with heart disease: a review
The analysis of ventilatory efficiency in cardiopulmonary exercise testing has proven useful for assessing the presence and severity of cardiorespiratory diseases. During exercise, efficient pulmonary gas exchange is characterized by uniform matching of lung ventilation with perfusion. By contrast, mismatching is marked by inefficient pulmonary gas exchange, requiring increased ventilation for ...
متن کاملEffect of Rehabilitation Continuous and Interval Aerobic Exercise on Depression and Anxiety in Patients With Cardiac Diseases after Coronary Artery Bypass Surgery
Objectives The current study aimed at serving the effects of continuous and interval exercise training on decreasing the depression and anxiety in patients with heart diseases after coronary artery bypass graft surgery. Methods The research method was semi-experimental and the statistical population included the cardiac patients after coronary artery bypass graft surgery at Tehran Heart Cente...
متن کامل